|
<br />~
<br />
<br />" ~
<br />o w
<br />" w
<br />o "
<br />U
<br />.
<br />o >
<br />o "
<br />U 0
<br />U
<br />" U
<br />"", ~
<br />is ..J
<br />~ ~
<br />"
<br />o
<br />"
<br />U
<br /><
<br />"
<br />~
<br />o
<br />w
<br />>
<br />U
<br />o
<br />U
<br />
<br />8~\lt
<br />,,- -I-
<br />+- "-,~l ...
<br />"
<br />00 .
<br />q
<br />'",-'"
<br />c.o
<br />u
<br />~I"" o~
<br />UXCl>__
<br />'- ~ 0 m
<br />'" .0-"",
<br />" --
<br />c
<br />o
<br />
<br />;1..
<br />"10
<br />- .
<br />CU._
<br />
<br />>
<br />t;
<br />o
<br />8
<br />
<br />c. ~
<br />",U",.,...
<br />: 0 8 ".
<br />"'--' 00
<br />'" 0 -... '"
<br />+-1..."-0
<br />""
<br />.
<br />.
<br />0_
<br />'-0
<br />.,,<::'O+-
<br />"'00<11
<br />"'-0"'"'
<br />'- "'- '- '"
<br />"''''''-u
<br />'0
<br />o
<br />
<br />.
<br />o
<br /><
<br />o
<br /><
<br />-
<br />
<br />" ;1-
<br />ou
<br />,- 0
<br /><:::..ul;.-
<br />
<br />,- .
<br />. .~
<br />Ill.,,>....
<br />c u
<br />.....jIl-",
<br />~ w
<br />
<br />o
<br />o
<br />.
<br />-
<br />"
<br />
<br />-
<br />
<br />.
<br />o
<br />o
<br />"
<br />
<br />uo
<br />"',....
<br />- '"
<br />.~ " "
<br />:>: '" ~.-
<br />
<br />GRANGEH/\LLCr,IEK
<br />':;rou~ 4
<br />
<br />Stream and eJ~in Ch~ractQrlstlcs
<br />Grange Ha II Creek, " lelt-Ilank trlbytJry of the Sout~
<br />Platte Rlvo~, j s the t~rthest do~n5tream 01 the stro"""5 stud 100 j n
<br />tn; s vol~rne. The ",,,i ~ stern rises I n the western sectTen of Nort~-
<br />
<br />o
<br />"
<br />o
<br />,
<br />c
<br />o
<br />"
<br />.~1
<br />~I
<br /><'
<br />~I
<br />
<br />N
<br />0 0
<br /> "
<br />- -
<br />0 "
<br />0 0
<br />- 0
<br /> -
<br />- -
<br />0 0
<br />
<br />glen~ ~nd flows eastward ~bout 5.5 ~11e5 to join the South Platte
<br />RivGr just north of East I04th Avenuo. A major trlbutQry, oe5i9-
<br />natod South Fork, rl~o~ in WO~Ter~ Thornton and Joins th~ ~a;n st~
<br />downstream from Irm~ Drive. These streoms. with the other trlbu-
<br />t~ries, drai n about 9 square miles of roll i ng ur lands and lovol
<br />South Platte River flood pl~in. From the headwaters to tho junction
<br />'wlthSouthFork,thevalleyserellarrowandsteepsldedwlthbod
<br />$ lopes averag i ng 60 foot per m I Ie. I n the '" i :Jd I e reac~', the Vi} I I ey
<br />'~Idens ilnd the gr~c iunt reduces to an ~verago of 40 feet per mi Ie.
<br />^"" the ~tred'" I"'dves tbo upl<lnds and enters tho widE> South rl~tte
<br />Rh'er flood plains, the valley beCOffi<)S InJofi n~ble ilnd the graJient
<br />dror,toilnaVOr'lgeof3Qteettothllmile. l-Iere,alsQ,thestre"m
<br />en~ors a orepered clliloncl for conveyence across the flood plai~.
<br />On Gr.'ngo Hall (;roHk, I ike oth~r undeveloped >troeros in
<br />the ~re", ~e f lood rcccrd~ are aVd i l;ob Ie, tl\:t urbani ,,,tion hilS o"ly
<br />
<br />0 ro
<br />N ,
<br /> -
<br />0 c'
<br />^ '"
<br />
<br />8otl\ro<1 the b,~sln In th" I",t ton yoars, and. In trlO fu'lure is
<br />
<br />- -
<br />-, .,
<br />, 0
<br />- -
<br /> ,
<br />" "
<br />, , "
<br />< <
<br /> "
<br /> < "
<br />. .
<br />" 0
<br />- 0 "
<br /> >
<br />. . "
<br />< .,
<br />" " .
<br />, 3 !
<br /> 0
<br /> .
<br /> "
<br />. ,. 0
<br />. -
<br />0 0 0,
<br /> "
<br />
<br /><lxpeoted to muve fJrthur dO'~nstrean. hero tho 11000 p lill n is broader
<br />and dovelop~nts wi I I be moro susceptible to da~ago fr~ OVerban,
<br />f I 'Ow" The ~pper DQrt ion of the "''' i n stra,~m, locateJ i n t~ll sou~r.ern
<br />Norh81enn develor'll'~nt district, i5 ciosa to fho hoadw<ltors and has
<br />5001e incldent;;1 flOOd protection trom ao upstream reservoir. n,i;
<br />area COC5 not ~pp{la; to havo " ser iOU5 t lood prob Ie'" <lncl wi I I not be
<br />jl~C:J~5"~ io t~15 roport. [Jcca'J5~ o. t~", wider flood pl/}i~ d~ol
<br />(jreater cil<lnCtl of oein8 tI0uJuJfro01I,I<j:,-ir.t;lr1s!+yrJinfall ro"oH,
<br />thO} unJev",10ped va II ~y; do'~ns~rea.., a~d e1st of thO} )Jorfhg len" are1
<br />an.:! a10,09 the So"t~, Fcrk trlbd"ry In tho cxp,mdi~q Thornton :jc\'clo~"~nt
<br />
<br />"
<br />
|